Cutting plate of dry-shaving apparatus



R KEBLUSEK CUTTING PLATE OF DRY SHAVING APPARATUS Filed July l, 1946 Nov. 4, 1952 Patented Nov. 4, 1952 CUTTING PLATE OF DRY-SHAVING APPARATUS Richard Keblu'ek, Eindhoven, Netherlands, as-

signor to Hartford National Bank and Trust Company, Hartford, Conn., as trustee Application July 1, 1946, Serial No. 680,571 In the Netherlands November 4, 1942 Section 1., Public Law 690, August 8, 1946 Patent expires November 4, 1962 s claims. `(C1. 311-43) There has already been proposed -a cutting plate for a dry-shaving apparatus whereby the capacity of the apertures of letting through the hairs and the skin is adjustable so that it is possible to adapt the shaver to any growth of hair' and to any degree of suppleness of the skin.

Another object of the invention is to render possible adaptation to the growth of hair and to the thickness of skin without any need of performing any manipulation on the cutting plate itself.

According to the invention, in the case of a cutting plate of a dry-shaving apparatus which exhibits apertures of different sizes, the large and the small apertures are grouped for this purpose in different running surfaces for the cut ting member. This creates the possibility of utilizing different interchangeable cutting members which each cooperate with a group of apertures of a certain size which may be considered as ideal as possible for a determined growth of hair and for determined properties of the skin. Sincev the other groups of apertures are provided in one or more other running surfaces, they are not swept by the cutting member chosen and therefore take no part in the cutting operation.

It follows from the above that the number of groups of apertures also determines the number of possibilities of adaptation.

For a better understanding it may furthermore be mentioned here that a group may comprise only a single slit-shaped aperture.

For a further increase of the shaving capacity, it is possible to provide additional smaller apertures in the running surface of a group of apertures, by which means the shaving operationis accelerated.

In one embodiment of the invention the apertures consist of slits of decreasing, preferably of continuously decreasing width.

The apertures which take no part in the shaving operation should preferably be closed'since it has been found that comparatively'thick hairs which enter into these apertures are frequently clamped therein, causing the sensation of scratching. The apertures may be closed, for example, by covering them with the aid of an extremely thin removable cover plate provided so as to be slidable or rotatable. l

It should be noted however, that when the comparatively large or small apertures are used in the shaving operation, the following distinction is observed. When the comparatively small apertures are used, the larger ones should be covered, but when the comparatively large apertures are used, the smaller apertures may continue to take part in the shaving operation unless, compared with the hair thickness of the person Who shaves himself, the dimensions of the smaller apertures are so small that even vif they cooperate with a cutting member the hairs may be clamped in the slits Which are too narrow for them.

Although it is possible each time to use different cutting members separately for each group of apertures, it is advisable, according to the invention, to utilize a single cutting member which has cutting edges located in separate running surfaces of different dimensions.

The invention will be explained more fully with reference to the accompanying drawing in which:

Figures 1-5 diagrammatically represent several embodiments of the invention.

Figure 6 is a sectional-view taken along the line VI-VI of Figure 1.

Figure 7 shows a top plan View of a cutting member according to the invention.

Figure 8 is a cross-sectional View 'of the cutting member of Figure '7 taken along the line VIII-VIII.

Figure 9 diagrammatically shows a plan vie of another embodiment of the invention.

Figures 10-12 are cross-sectional views in elevation of the cutting member for the embodiment shown in Figure 9.

Fig. 1 shows a cutting plate I of constant thickness having apertures 2 and 3 of different sizes which are grouped in different running surfaces 4 and 5 respectively for the cutting member. In the lateral elevation in Figure 6 the reciprocating cutting member is denoted by 6; its teeth 'l cooperate with running surfaces 4 provided with large apertures 2. The running surfaces 5 take no part in the shaving operation since between the teeth 'l the cutting member is provided with a continuous groove. Persons having a thin and supple skin which is unsuitable for the large apertures 2 may take use of the running surfaces 5 which are provided with small apertures by turning the cutting member 6 through 180, as is indicated at 8, since the running surfaces and cutting edges which in both cases cooperate with one another are their reflected images.

Figures 2 to 5 show variations in the type of apertures in the cutting plate l. Figure 2'shows large and small elliptical apertures 22 and 23 respectively. Figure 3 shows large and small circular apertures 32 and 33 respectively. Finally, Figures 4 and 5 show -two types of continuously decreasing apertures, 9 and 29 respectively.

Sincethe apertures which are not operative may exert a; scratchingieffectpntheyhairs ywhich have not yet been cutoi, it is advisablel to cover these apertures with the aid of the cutting member itself. Such a cutting member is denoted in Figures '7 and 8 by I9. In the `position shown, which corresponds to the position of the cutting member 6 in Fig. 6, the teeth I0 cooperate with the apertures 2 provided inthe running'surfaces 4 Whereas the apertures 3'arecovered by anuninterrupted second running surface which consists in itself of two tracks I2 andwhichare flush with the level of the running surface vofV the cutting edges Il which are present. .This cutting member may also be used, as illustrated'in the lateral elevation of Fig. 6, in the position obtained by turning it through an angle of 180.

In Fig. 9 the invention has been applied to a .cuttingplateior-.a rotary cuttingmember. The .two-diiferent running surfaces i 3 and I4 exhibit :apertures -Iiand'l5fof different sizes so that at .Willeeither-the.running surface i3 with thelarge inE order to coverwthe i non-operative apertures the cutting member may .be provided with'uninterrupted additional .running surfaces, formed in the lpresenticaseeby circular tracks as indicated in Figurell at 2 l.

It may furthermore be mentioned that, while .payingregard tothat Awhich has beenmentioned in this respect in 'tl-iey preamble of the specicationfitiis advisable'. to construct the cutting. member for the plate shown inrFig.9. in such a mannereas shown *.in Fig.v 12 so that the one set of cutting edgeswhichfcooperates with the smaller .apertures :isproVided -With an additional circular 1running=surface-22 `whereas vthe other set of cutting edges is widened as indicated at 23 to such :an extent f that Ait -sweeps over the two running surfaces -|3vand i4 :with-theresult that the capacity is'raisedI tof its maximum.

Theseremarksalsol apply 'to the `construction of the cutting memberiofFigs. 1 tofS if it is con- -Jstructed "so zas' to be :reversible in the 'same vWay 1ras shown: in Fig. I2.

"Finally, iin Figs. 3 and 9 still smaller aperfturesrZilfand 'ilfareprovidedbetween the aper tureso'fa determined kgroup-in yorder to raise the shavingcapacityasfar as possible.

. `Wlratl'claim is:

:Lf-Af'cutter head "for dry shaving-apparatus, comprising "a cutting vplate having "a iirst 'running vsurface and i a secon'cl :running surface, said irst frunning ysurface being. .provided-with i a plurality foffapertures: having fafgiven size and said` second 'running surface -being 'provided with a plurality lsaid secondlrunningfsuriaces by reversal of said cutting member.

.2. IVA cutter .head @for :dr-y .shaving-apparatus,

comprising a cutting plate having a rst running surface and a second ruiming surface, said iirst running surface being provided with a plurality .ofapertureslhaving aggiven size andsaid second 5 'running'surface"beingprovided with-a plurality of apertures of greater size than said given size, and a cutter member comprising a rst cutting portionand anadjacently positioned first bear- ;ing surface and a second cutting portion disposed 180 opposite said rst cutting portion and an adjacently'positicned second bearing surface, said .cuttermemberbeing adapted to operate in a plurality of positions relative to said cutting plate, and. saidcuttingportions and said bearing surv .facesselectively engaging either said iirst or said second runningsurfaces by reversing said cutting portions.

'3. A cutter head for dry shaving apparatus, Vcomprising asubstantially flat cutting plate having a first running surface and a second running surface, said .first runningsurface being provided with :aplurality df .slit-like ,apertures .having `a varying width and of a given size, said second Yrunning surfacebeingprovided with a plurality of apertures similar in shape to saidiirst apertures'butpfgreater size than .said given size, a cutter member comprising anrst cutting portion adapted to engage said rst running surface and a second cutting portion ,disposed opposite said first cutting portion and adapted to .engagesaid second running surface, said cutter member being adapted to operateina plurality of ypositions rel- .ative to saidcutting plate and saidcuttingportions'selectively.engaging yeither said iirst runningsurface in oneposition of said cuttingimember orsaid second running surface in the .reversed position of vsaid cutting member.

4. A cutter head rfordry shaving apparatus, comprising a substantially iiatcutting plate .hav-

40 ing-afiirstrunning surface and a secondrunning surface, said first4 running surface beingilrovided witha pluralityof circular apertures spacedapart and `having a given size rand said second ruiming surfacebengprovided .with a plurality of circular apertures.spaced apart and of greater size than said given size, saidsecond running surface also being further provided With a plurality of minute apertures arranged between said .apertures of greater size, and a-cuttenmembercomprising a ,.0 .first Acutting vpor-tion anda second cutting portiondisposed opposite said rst cutting portion,

said cutter memberbeing-adapted tooperate in `a ,plurality of 'positions .relative to .said cutting plate andsaid Ycuttingportions selectively en- Vgaging either saidnrstrunning .surface none position Vof said cutting member or secondrunning surface in the reversed positiony of said cutting member.

5. :A .cutter head for dry shaving apparatus, comprising an annularcutting,platehaving aiirst annular runningsurfacefand a second annular Vrunningsurface concentric to said first. surface.

Vsaid .rstlrunning surface Ybeing provided Witha plurality of apertures having a given size and 6 saidsecond running. surface beingprovided with a plurality .of apertures of greater size than said given size, vanda cutter member comprising a iirst cutting portion arranged at. a certain radial distance 'from its axis o`f rotation to engage said first running surface, and a second cutting .por- `tion `disposed. .opposite said Yrst cutting portion and .arranged .at .a .dierent radial ldistance .to engage.Y said second running surface, VVsaid i. cutter .memberbeing adapted. to operatein aplurality ,ofpositionsrelativetd saidcutting plateand. said cutting portions selectively engaging either said rst running surface in one position of said cutting member or said second running surface in the reversed position of said cutting member.

6. A cutter head for dry shaving apparatus, comprising an annular cutting plate having a rst annular running surface and a second annular running surface concentric to said rst surface, said rst running surface being provided ranged on the opposite side of said support portion and arranged nearer to the axis of rotation than said rst series of segments so as to engage said second running surfaces, said rst and second series of cutter segments selectively engaging either said first running surface in one position of said cutting member or second running surface in the reversed position of said cutting member.

RICHARD KEBLUSEK.

REFERENCES CITED The following references are of record in the ile of this patent:

UNITED STATES PATENTS Number Name Date 2,105,223 Nicholl Jan. 11, 1938 2,269,875 Huntington Jan. 13, 1942 20 2,345,263 Jepson Mar. 28, 1944 2,369,198 Wyse Feb. 13, 1945 

